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Finding the Fourth Proportional to 220,992.63, 304,969.82 and 120,390.63

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Solution

The fourth proportional to 220,992.63, 304,969.82 and 120,390.63 is: 166,139.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,992.63 : 304,969.82 = 120,390.63 : x
  2. Step 2: Convert to fraction form
    220,992.63/304,969.82 = 120,390.63/x
  3. Step 3: Cross multiply
    220,992.63x = 304,969.82 × 120,390.63
  4. Step 4: Simplify right side
    220,992.63x = 36,715,508,760.79
  5. Step 5: Solve for x
    x = 36,715,508,760.79/220,992.63
  6. Step 6: Final answer
    x = 166,139.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.